Why did many Russian soldiers join the February Revolution against the Tsar?

However, the immediate cause of the February Revolution–the first phase of the Russian Revolution of 1917–was Russia's disastrous involvement in World War I. Militarily, imperial Russia was no match for industrialized Germany, and Russian casualties were greater than those sustained by any nation in any previous war.

Around 500,000 men or Half a million

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd